TA20 Series User Manual - AutomationDirect · 2019-09-06 · STRATUS TA20 Series Industrial Air Conditioners User Manual 1st Edition RevA. Unpacking STRATUS Air Conditioning Equipment

1w w w . a u t o m a t i o n d i r e c t . c o m STRATUS TA20 Series Industrial Air Conditioners User Manual1st edition RevA.

TA20 Series User Manual

1 - 8 0 0 - 6 3 3 - 0 4 0 52 STRATUS TA20 Series Industrial Air Conditioners User Manual1st Edition RevA.

Stratus TA20 Series User Manual

Please include the Manual Number and the Manual Issue, both shown below, when communicating with Technical Support regarding this publication.

Manual Number: Stratus_TA20_UM_WMO_1ed

Issue: 1st Edition

Issue Date: 12/16

Publication HistoryIssue Date Description of Changes

First Edition 12/16/2016 Original

Rev. A 05/24/2019 Unit Specifications Updated pg. 8


Table of ConTenTsOverview 5Unpacking STRATUS Air Conditioning Equipment 6What’s in the Box 6Nameplate Information 6Inspecting the Equipment 6Basic Operation 7Features 8Unit Specifications 8Preliminary Testing 10Mounting the Air Conditioner 10System Operation 11System Faults 11Alarm Conditions 11Digital Temperature Controller 12Functions and Parameters 13Preventative Maintenance 15Troubleshooting Guide 16Dimensions 17Schematics 20Notes and Model Information 23Replacement Parts 23


~ WARNING ~Thank you for purchasing automation equipment from Automationdirect.com™, doing business as AutomationDirect. We want your new automation equipment to operate safely. Anyone who installs or uses this equipment should read this publication (and any other relevant publications) before installing or operating the equipment.

To minimize the risk of potential safety problems, you should follow all applicable local and national codes that regulate the installation and operation of your equipment. These codes vary from area to area and usually change with time. It is your responsibility to determine which codes should be followed, and to verify that the equipment, installation, and operation is in compliance with the latest revision of these codes.

At a minimum, you should follow all applicable sections of the National Fire Code, National Electrical Code, and the codes of the National Electrical Manufacturer’s Association (NEMA). There may be local regulatory or government offices that can also help determine which codes and standards are necessary for safe installation and operation.

Equipment damage or serious injury to personnel can result from the failure to follow all applicable codes and standards. We do not guarantee the products described in this publication are suitable for your particular application, nor do we assume any responsibility for your product design, installation, or operation.

Our products are not fault-tolerant and are not designed, manufactured or intended for use or resale as on-line control equipment in hazardous environments requiring fail-safe performance, such as in the operation of nuclear facilities, aircraft navigation or communication systems, air traffic control, direct life support machines, or weapons systems, in which the failure of the product could lead directly to death, personal injury, or severe physical or environmental damage (“High Risk Activities”). AutomationDirect specifically disclaims any expressed or implied warranty of fitness for High Risk Activities.

For additional warranty and safety information, see the Terms and Conditions section of our catalog. If you have any questions concerning the installation or oper-ation of this equipment, or if you need additional information, please call us at 770-844-4200.

This publication is based on information that was available at the time it was printed. At AutomationDirect we constantly strive to improve our products and services, so we reserve the right to make changes to the products and/or publications at any time without notice and without any obligation. This publication may also discuss features that may not be available in certain revisions of the product.

TrademarksThis publication may contain references to products produced and/or offered by other companies. The product and company names may be trademarked and are the sole property of their respective owners. AutomationDirect disclaims any proprietary interest in the marks and names of others.

Copyright 2016, Automationdirect.com™ Incorporated All Rights Reserved

No part of this manual shall be copied, reproduced, or transmitted in any way without the prior, written consent of Automationdirect.com™ Incorporated. AutomationDirect retains the exclusive rights to all information included in this document.

~ AVERTISSEMENT ~Nous vous remercions d’avoir acheté l’équipement d’automatisation de Automationdirect.com™, en faisant des affaires comme AutomationDirect. Nous tenons à ce que votre nouvel équipement d’automatisation fonctionne en toute sécurité. Toute personne qui installe ou utilise cet équipement doit lire la présente publica-tion (et toutes les autres publications pertinentes) avant de l’installer ou de l’utiliser.

Afin de réduire au minimum le risque d’éventuels problèmes de sécurité, vous devez respecter tous les codes locaux et nationaux applicables régissant l’installation et le fonctionnement de votre équipement. Ces codes diffèrent d’une région à l’autre et, habituellement, évoluent au fil du temps. Il vous incombe de déterminer les codes à respecter et de vous assurer que l’équipement, l’installation et le fonctionnement sont conformes aux exigences de la version la plus récente de ces codes.

Vous devez, à tout le moins, respecter toutes les sections applicables du Code national de prévention des incendies, du Code national de l’électricité et des codes de la National Electrical Manufacturer’s Association (NEMA). Des organismes de réglementation ou des services gouvernementaux locaux peuvent également vous aider à déterminer les codes ainsi que les normes à respecter pour assurer une installation et un fonctionnement sûrs.

L’omission de respecter la totalité des codes et des normes applicables peut entraîner des dommages à l’équipement ou causer de graves blessures au personnel. Nous ne garantissons pas que les produits décrits dans cette publication conviennent à votre application particulière et nous n’assumons aucune responsabilité à l’égard de la conception, de l’installation ou du fonctionnement de votre produit.

Nos produits ne sont pas insensibles aux défaillances et ne sont ni conçus ni fabriqués pour l’utilisation ou la revente en tant qu’équipement de commande en ligne dans des environnements dangereux nécessitant une sécurité absolue, par exemple, l’exploitation d’installations nucléaires, les systèmes de navigation aéri-enne ou de communication, le contrôle de la circulation aérienne, les équipements de survie ou les systèmes d’armes, pour lesquels la défaillance du produit peut provoquer la mort, des blessures corporelles ou de graves dommages matériels ou environnementaux («activités à risque élevé»). La société AutomationDirect nie toute garantie expresse ou implicite d’aptitude à l’emploi en ce qui a trait aux activités à risque élevé.

Pour des renseignements additionnels touchant la garantie et la sécurité, veuillez consulter la section Modalités et conditions de notre documentation. Si vous avez des questions au sujet de l’installation ou du fonctionnement de cet équipement, ou encore si vous avez besoin de renseignements supplémentaires, n’hésitez pas à nous téléphoner au 770-844-4200.

Cette publication s’appuie sur l’information qui était disponible au moment de l’impression. À la société AutomationDirect, nous nous efforçons constamment d’améliorer nos produits et services. C’est pourquoi nous nous réservons le droit d’apporter des modifications aux produits ou aux publications en tout temps, sans préavis ni quelque obligation que ce soit. La présente publication peut aussi porter sur des caractéristiques susceptibles de ne pas être offertes dans certaines versions révisées du produit.

Marques de commerceLa présente publication peut contenir des références à des produits fabriqués ou offerts par d’autres entreprises. Les désignations des produits et des entreprises peuvent être des marques de commerce et appartiennent exclusivement à leurs propriétaires respectifs. AutomationDirect nie tout intérêt dans les autres marques et désignations.

Copyright 2016, Automationdirect.com™ IncorporatedTous droits réservés

Nulle partie de ce manuel ne doit être copiée, reproduite ou transmise de quelque façon que ce soit sans le consentement préalable écrit de la société Automationdirect.com™ Incorporated. AutomationDirect conserve les droits exclusifs à l’égard de tous les renseignements contenus dans le présent document.


Overview of this PublicationThank you for purchasing a STRATUS Air Conditioner. This manual shows you how to install, program and maintain all STRATUS Air Conditioners in the series.

Who Should Read This ManualThis manual contains important information for those who will install, maintain, and/or operate any of the STRATUS Air Conditioners. It will provide the information you need to keep your system up and running.

Technical Support By Telephone: 770-844-4200

(Mon.-Fri., 9:00 a.m.-6:00 p.m. E.T.)

On the Web: support.automationdirect.com

We strive to make our manuals the best in the industry. We rely on your feedback to let us know if we are reaching our goal.

Our technical support group is glad to work with you in answering your questions. If you cannot find the solution to your particular situation, or, if for any reason you need additional technical assistance, please call technical support at 770-844-4200. We are available weekdays from 9:00 a.m. to 6:00 p.m. Eastern Time.

We also encourage you to visit our web site where you can find technical and non-technical information about our products and our company. Visit us at www.automationdirect.com.

Special Symbols

IntroductionSTRATUS air conditioning equipment is carefully designed to cool and dehumidify the air in electronic component enclosures. Use this guide as general instructions to properly install and operate the STRATUS air conditioning equipment. Read this guide completely before running or installing your STRATUS air conditioning equipment.

Prepare the enclosure that is to be cooled for mounting in accordance with this guide and the template supplied.

Preliminary tests must be performed before mounting or installing the air conditioner.

STRATUS air conditioning equipment must be mounted vertically with a minimum of 5” air space for condenser air return and supply.

When you see the “exclamation mark” icon in the left-hand margin, the paragraph to its immediate right will be a warning. This information could prevent injury, loss of property, or even death (in extreme cases).

When you see the “notepad” icon in the left-hand margin, the paragraph to its immediate right will be a special note.


Unpacking STRATUS Air Conditioning Equipment Always keep air conditioner unit top up as shown by the packaging label and arrows. If the unit is to be transported after initial unpacking and inspection, place air conditioner back in original packing to prevent damage.

For shipment, repack as received and re-band to the pallet. Shipping without being strapped to the pallet may result in tipping and damage and voids the warranty.

Air conditioners are not designed to be shipped attached to an equipment enclosure. If this is required, the air conditioner must have sufficient support to prevent damage due to vibration and shock. Air conditioners damaged internally, due to being shipped attached to enclosures, are warranty voided.

Inspecting the EquipmentSTRATUS air conditioning equipment is designed, manufactured and packed to prevent damage from normal handling, shock and vibration during shipment. Please be sure to inspect your equipment upon receipt to ensure that there is no visual or hidden damage.

Upon receipt of the equipment, ensure that it is always top side up as indicated by “THIS SIDE UP” labels; this ensures that the compressor oil is not displaced.

If the equipment has been on its side, it must be put upright for at least 24 hours before running to be certain the compressor oil has returned to the compressor.

All physical damage to packing or signs of damage to the equipment must be noted on the freight bill of lading. Packages must be opened after receipt to inspect for any internal /concealed damage to the equipment and to verify proper count and order fulfillment. Shipments delivered without the pallet, not top-side up, other freight on top, damaged or wet should be refused delivery. Contact the shipper immediately upon discovery of shipping damage to schedule inspection by the freight company. Keep all packing. AutomationDirect cannot take responsibility for customer’s failure to file freight damage claims on a timely basis.

1000 and 2000 BTU/Hour Models• 1 Pre-bagged Hanger Bolt Kit includes (10) - 1/4 - 20 x 3/4 Machine Screws/ Unslotted/ Indented Hex Washer Head, Steel/Zinc (10) - 1/4 Medium Split Lock Washers, Steel/Zinc (10) - 1/4 Flat Washer/Machine Screw, Steel/Zinc• Rubber Seal Gasket X-114HT Pre-Cut, QTY 8.5 feet. NEMA/UL Type 4 and 4X units have gasket installed• Instruction / Operation Manual

• Actual Size Mounting Template

What’s in the BoxUpon receipt of the STRATUS Air Conditioner, please check for the following:

• Make sure that the box contains all items required for installation of your series.

• Inspect the unit to ensure it was not damaged during shipment.

• Make sure that the part number indicated on the serial number label corresponds with the part number of your order.

Volts Amps Phase Hz 60Refrigerant OuncesDesign Pressure:Low Side psi High Side psi

Motor-Compressor Thermally ProtectedUL Type 12, 04, 4X Interface to Electronic Enclosure per UL 50 & 508a

Special PurposeAir Conditioner

S/NMODEL No.

BTU/H

NEMA Type

Automation Direct • 800.633.0405www.automationdirect.comUL File # SA33404

Input SpecificationRefrigerant Type/Weight

Refrigerant PressureEnclosure RatingA/C Unit Serial NumberA/C Unit Model Number

Nameplate InformationBe sure to record the data from the label onto the back of the manual and keep in a safe place for warranty.

WARNING: Before operating the air conditioner, inspect all electrical wiring to ensure proper installation and wiring to the proper power source. The minimum circuit amperage must be 125% of the air conditioner label amperage listed for the voltage selected.


Basic OperationThe STRATUS air conditioner will lower the temperature inside an enclosure to ensure its proper operational temperature. STRATUS air conditioners, when sized properly, will provide cooling as necessary, automatically controlled through the digital temperature controller.

STRATUS air conditioners operate as a “closed loop” system where the enclosure air is taken into the STRATUS air conditioner and cooled, and then returned to the enclosure with no exposure to, or introduction of, outside / ambient air. This assures the enclosure is separated from, and not contaminated with, ambient air, dirt, chemicals, dust, moisture or foreign matter, so that sensitive enclosure components are protected and kept cool / dehumidified. The STRATUS air conditioner refrigeration cycle removes warm enclosure air and excess humidity. The humidity condenses to liquid and the Condensate Removal System changes it back into vapor where it is then vented to the atmosphere. In the event of excess water where the enclosure door has been left open, there is an overflow hole on the bottom of every unit.

The evaporator fan runs continuously to provide the required climate control to the enclosure. The compressor turns on if the enclosure temperature is greater than the factory setpoint of 95°F plus the temperature differential of 5°F. As the refrigerant pressure builds to a factory setpoint, the condenser fan turns on to force air flow across the coils. Refrigerant low pressure and high temperature safety switches shut the compressor off if the evaporator coil begins to ice up, if there are leaks in the system, or if the condenser coil overheats. The temperature control display will indicate an LED alarm indication ((!)) and specific alarm, such as HA for high temperature alarm, or CA for low

pressure/low temperature alarm. After the compressor stops, most alarm conditions will resolve (pressure will equalize) and the snowflake LED on the temperature control will blink to indicate that the compressor is off for the five minute anti-short cycle time delay.

Refer to the Troubleshooting Guide for corrective action, as the condition may repeat in 7-minute cycles. For 2 minutes the alarm condition is bypassed to prevent nuisance trips. Then, there is a 5-minute, anti-short cycle time delay before the compressor is turned on.

The refrigerant thermal expansion valve assures optimum cooling efficiency through a wide range of operating temperatures. It requires no adjustment or maintenance.

STRATUS NEMA/UL type 4X stainless steel units and NEMA/UL type 4 units come with condenser coils coated with a cutting-edge, high efficiency, electrically applied, corrosion-resistant coating.

Closed Loop Cooling

Thermal ExpansionValve

EvaporatorCoils

EvaporatorFan

Compressor

Condensate Removal System Condenser

Coils

Thermal ExpansionValve

Evaporator

Compressor

Condenser

Refrigeration Cycle


Features• Condensate Removal System• High Condenser Refrigerant Temperature Control• Low Refrigerant Pressure Cut-out Switch• Digital Temperature Control Thermostat troubleshooting

diagnostics• Anti short-cycle Time Delay and Bypass Time Delay• Condenser Fan Cut-in Control Pressure Switch• Powder coated to prevent rust (NEMA/UL Type 12 and 4)• Material: NEMA/UL Type 12, Type 4: 16-gauge cold

rolled steel chassis and shroud

• NEMA/UL Type 4x: 304 stainless steel chassis and shroud • Chassis and shroud seal system ensures closed loop air

circulation• Condenser inlet air filter• Thermal expansion valve provides high performance over

wide temperature range• Internally insulated to minimize case heat loss• Schrader valves on low AND high pressure service ports• High efficiency performance = high BTU per KWH for

minimal electricity cost• Auxillary alarm contacts as a standard

NEMA Type 12 Unit Specifications

ModelBTU/H @

Max. Ambient Temperature

Standard Max. Ambient Temperature Volts/Hertz Running

Amps

Unit Weight

(lb)

Refrigerant Type

Refrigerant Amt. (oz)

Typical Frame Size

TA20-010-16-121000

125°F (51.67°C)

115/60 2.70 31

R134a

6.00TA20-0

TA20-010-48D-12 48VDC 3.50 30 6.00

TA20-020-16-122000

115/60 4.10 42 12.00TA20-1

TA20-020-26-12 230/60 2.00 45 12.00

Unit Specifications

Voltage variation no greater than ± 10% from nameplate rating and Frequency variation no greater than ± 3Hz from nameplate rating.


NEMA Type 4X Unit Specifications

ModelBTU/H @


Standard Max. Ambient Temperature Volts/Hertz Running

Amps

Unit Weight

(lb)

Refrigerant Type


Typical Frame Size

TA20-010-16-4X1000

125°F (51.67°C)

115/60 2.70 31

R134a

6.00TA20-0

TA20-010-48D-4X 48VDC 3.50 30 6.00

TA20-020-16-4X2000

115/60 4.10 42 12.00TA20-1

TA20-020-26-4X 230/60 2.00 45 12.00

NEMA Type 4 Unit Specifications

ModelBTU/H @


Standard Max. Ambient Temperature Volts/Hertz

Running Amps

Unit Weight

(lb)

Refrigerant Type


Typical Frame Size

TA20-010-16-041000

125°F (51.67°C)

115/60 2.70 31

R134a

6.00TA20-0

TA20-010-48D-04 48VDC 3.50 30 6.00

TA20-020-16-042000

115/60 4.10 42 12.00TA20-1

TA20-020-26-04 230/60 2.00 45 12.00

Unit Specifications

* Voltage variation no greater than ± 10% from nameplate rating and Frequency variation no greater than ± 3Hz from nameplate rating.

* Voltage variation no greater than ± 10% from nameplate rating and Frequency variation no greater than ± 3Hz from nameplate rating.


Preliminary TestingBefore installing the STRATUS system on the enclosure, operate the unit for 20 to 30 minutes to ensure it is functioning properly. Although the unit has been tested at the factory, internal damage, which may have not been apparent during the unpacking inspection, may have occurred during shipping.

• Place the system on a solid base, such as a workbench or table.• Check that the warm air system filter is in place for TA20-020-

xx-xx series.• Check the serial number label to be sure the electric power

available to the air conditioner is the proper voltage, phase and amperes.

• Check electric power source for proper ground wire and neutral wire installation.

• Check to verify that the electric power is protected by an appropriately sized fuse or circuit breaker.

• As soon as power is supplied to the system, the cool air evaporator fan will begin to operate. The compressor and warm air condenser fan will not operate if the room air temperature is below 100°F. This is because the programmable controller has a factory setpoint of 95°F plus 5°F differential parameter (Hy). The digital display on the face of the controller will be displaying room temperature. If the display indicates 100°F or warmer, the snowflake status LED will display and the compressor will operate. The warm air condenser fan will come on shortly after the compressor, when the refrigerant pressure builds to approximately 300 psi. If the display indicates a temperature less than 100°F, adjust the setpoint to a temperature lower than the room temperature in order for the compressor and warm air condenser fan to operate. Refer to the Digital Temperature Controller section of this manual in order to change the factory setpoints.

• With the compressor and both fans functioning, allow the unit to operate for 20 to 30 minutes. This will provide sufficient time for the vapor compression system to achieve equilibrium. Measure the cool air outlet temperature with an accurate thermometer. This temperature should be at least 10 degrees colder than the inlet air temperature (if the room temperature is warmer than 70°F). Inlet air temperature will be displayed on the programmable controller. In areas of high humidity, the temperature difference may be less than 10 degrees.

• After completing the above check points, the electrical enclosure is ready to be prepared for the installation of the STRATUS AC unit.

Mounting the Air ConditionerCaution: To prevent damage to the coils, use ONLY the mounting bolts provided with the unit.

Using the template supplied, determine where the air conditioner is to be mounted and make sure that all required cuts and holes will not interfere with or damage the enclosure. There must be 5” clearance between walls / obstructions and the air conditioner so as not to restrict the condenser supply air and return air flow. Restricted condenser air flow will affect the air conditioner’s performance.

Caution: If mounting the air conditioner to the enclosure door, confirm with the enclosure manufacturer that the door’s hinges will support the air conditioner’s added weight (see equipment specifications). Ensure that when the door is fully open, that the enclosure will not topple over due to the off-center load.

Mount the air conditioner high on the enclosure in order to cool the hot air in the top of the enclosure. Position the unit where the cold air can circulate across the width of the enclosure to cool it all the way across.

Once proper mounting placement is determined, turn the enclosure equipment off, if possible, to prevent damage. Drill and cut the holes as indicated on the actual size mounting template included in the package. Install insulation gasket as required to ensure an air-tight closed-loop seal. Hang the air conditioner on the Easy Hang tabs.

From inside the enclosure, use the fasteners supplied to attach the air conditioner to the enclosure. Tighten the bolts in stages so that there is equal pressure at all points of attachment. Ensure that these fasteners are tight so as to prevent the unit from falling off the enclosure. These fasteners should be checked periodically to be sure that they have not become loose because of vibration.

Verify that the power supplied is compatible with the air conditioner’s power requirements provided on the air conditioner serial number label. Properly connect to a circuit with a minimum 15 amp capacity circuit breaker and proper voltage and frequency. Please check the specification label on the unit for exact amp rating. Test the voltage at the power source for proper polarity and good ground.

After mounting the air conditioner, replace / close the enclosure door and start air conditioner; test for air leaks to ensure a proper closed air loop seal, and run-test the unit to assure proper operation after mounting. If any cold air leaks are found, check for proper mounting and apply silicone-free Lexel sealer if leaks persist. Check that the air conditioner’s condenser inlet air filter is installed properly and make sure it is cleaned regularly.

Note: Turn the unit off if any of the equipment makes any unexpected or hard mechanical noises or vibrations, and refer to the Troubleshooting Guide.

Note: If the Digital Temperature Controller displays any alarms, refer to the Digital Temperature Controller section.


System OperationOnce the STRATUS system has been installed onto the enclosure and the power has been connected to a properly grounded power source with adequate voltage and current supply, the unit is ready for operation. As soon as electrical power is supplied to the STRATUS system and the power switch located on the back of the unit is turned on, the evaporator fan will start to operate. The fan will run continuously so that the controller can monitor the enclosure’s internal temperature. The enclosure temperature will be displayed on the face of the controller. If the enclosure temperature is greater than the cooling setpoint of 95°F plus factory-set temperature differential of 5°F, the snowflake status LED will be ON and the compressor will turn on. After the refrigerant pressure builds up to a factory setpoint of 300 psi, the condenser fan will operate.

This signifies that the cooling system has begun operation to remove heat and humidity from the enclosure. If the heat load within the enclosure is less than the cooling capacity of the STRATUS system, the temperature on the digital display will begin to drop. When the temperature inside the enclosure drops to the factory-set 95°F setpoint, the compressor will cycle off. The cool air evaporator fan will continue to operate, circulating air within the enclosure. The compressor fan will cycle off if the pressure drops below the factory setpoint.

Example: “Cooling on” @ 100°F; “Cooling off” @ 95°F. Set point is 95°F plus 5°F Hysteresis= Cooling on @ 100°F.

If the compressor attempts to cycle within 5 minutes, the snowflake status LED will FLASH. This indicates that the compressor’s automatic timer is working (the anti-short-cycle timer is factory set at 5 minutes). At the end of 5 minutes, the compressor will begin to operate and the snowflake status LED will remain ON while the compressor remains on.

System FaultsIf any of the critical control parameters exceed limits, the compressor is turned off, an alarm condition is indicated on the front panel, and an alarm contact operates for remote alarming.

Three main conditions can shut down the AC compressor: • The condenser high temperature alarm • The evaporator coil alarm • The compressor thermal overload

In the event that the condenser coil overheats, a condenser high temperature alarm, HA2, will flash on the display of the digital temperature controller, the remote alarm contact will operate, and the compressor will turn off after a 3-minute time delay.

In the case that the evaporator coils ice up or there is a leak, an evaporator coil alarm, CA, will flash on the display of the Digital Temperature Controller, the remote alarm contact will operate, and the compressor will turn off after a 2-minute time delay.

A thermal overload protects the compressor against faults. In the event that the snowflake status LED is not flashing on the display and the compressor is not running, an internal fault may have occurred on the unit. Refer to the Troubleshooting Guide in this manual.

Alarm ConditionsIf any of the alarm parameters exceed limits, an alarm condition is indicated on the front panel and an alarm contact operates for remote alarming.

The temperature alarms are delayed for 30 minutes at initial startup. If the preset high temperature limit is exceeded for more than 3 minutes, the compressor continues to operate but there is a maximum temperature alarm, HA, flashing on the display.

If the preset low temperature limit of 45°F is exceeded for more than 3 minutes, there is a minimum temperature alarm, LA, flashing on the display. (The compressor turns off at the temperature setpoint.)

In case of a fault in the enclosure temperature probe “P1”, the start and stop of the compressor are delayed for 5 and 15 minutes, respectively. A P1 alarm will display and the remote alarm contact will operate immediately.

In case of a fault in the condenser temperature probe “P2”, a P2 alarm will flash on the display and the remote alarm contact will operate immediately.

If the evaporator coil pressure drops below 10 psi for more than 2 minutes, there is an evaporator coil alarm, CA, and the compressor turns off. After the pressure is increased to 25 psi, the CA alarm is cleared and the compressor operates after a 5-minute time delay.

Time

Temperature

Compressor

SET

ON


Front Panel CommandsSymbol Visual Mode Programming Mode

To display target setpoint in memory. Hold >2 sec to enter Programming Mode

Selects or confirms an operation

(UP): To display maximum temperature setpoint in memory

Displays parameters or increases value

(DOWN): To display minimum temperature setpoint in memory

Displays parameters or decreases value

To lock and unlock the keyboard

To return to the room temperature display

To enter programming mode

+

+

+

FRONT PANEL COMMANDS

KEY COMBINATIONS

LED FUNCTIONS

LED FunctionsLED MODE FUNCTION

ON Compressor enabled

Flashing Anti short-cycle delay enabled

ON An alarm is occurring (CA or HA)

°F ON Measurement unit

°F Flashing Programming phase

Digital Temperature Controller

OverviewThe microprocessor-based digital temperature controller performs the functions of controlling the enclosure temperature while monitoring operating limits and refrigerant pressures. Temperature and alarm status are indicated on the front panel in easy-to-read LEDs (0.57”x 0.29” [14.5 mm x 7.3 mm]). It also records the maximum and minimum temperatures within the enclosure.

The controller includes a compressor anti short-cycle time delay (Parameter AC = 5 minutes) for compressor protection. A factory-set bypass time delay of 2 minutes prevents nuisance trip-outs caused by cold weather startups and transient high temperature limits.

The inputs include one enclosure temperature probe (NTC input), one condenser coil temperature probe (NTC input) and one low pressure switch digital input. Select parameters (listed in the setpoint table) are configurable through the keypad.

(Customer wired)


Functions and ParametersTemperature Controller Setpoints

Function Operation Parameter Operating Range Factory Set Point

Cooling Setpoint Set cooling relay SET 70 to 95°F 95°FCooling Differential Control hysteresis Hy 1 to 45°F 5°F

Compressor Protection Anti short-cycle AC 0 to 50 minutes 5 minutes

*Probe DisplayedSelects display probe P1 - Enclosure Temp P2 - Condenser Temp

Lod P1, P2, P3, P4 P1

Max Temp Alarm Panel Indicator ALU 45 to 302°F 105°FMin Temp Alarm Panel Indicator ALL -67 to 105°F 45°F

*Note: P3 and P4 are not used and if selected will result in noP flashing on the display.

Main Functions

1. Press and immediately release the SET key. The display will show the setpoint value.2. Press and immediately release the SET key or wait for 15 seconds to display the probe value again.

1. Press the SET key for more than 2 seconds to change the setpoint value. The value of the setpoint will be displayed and the F LED starts blinking.

2. To change the SET value, press the UP or DOWN arrow key within 15 seconds.3. To store the new setpoint value, press the SET key again or wait 15 seconds.NOTE: The set value is stored even when the procedure is exited by waiting for the time-out to expire.

To change the parameter’s value, operate as follows:1. Enter the Programming mode by pressing the SET + DOWN arrow keys for 3 seconds. The F LED starts blinking.2. Select the required parameter by pressing the UP or DOWN arrow key. Press the SET key to display its value.3. Press the UP or DOWN arrow key to change its value.4. Press SET to store the new value and move to the following parameter.

To exit: Press SET + UP arrow keys or wait 15 seconds without pressing a key.NOTE: The set value is stored even when the procedure is exited by waiting for the time-out to expire.

1 .Press and hold the SET and DOWN arrow keys simultaneously for more than 3 seconds. (The °F LED starts blinking.)2. Release the keys, then push the SET and DOWN arrow keys simultaneously , again for more than 7 seconds.

The Pr2 label will be displayed immediately followed by the HY parameter.3. Select the required parameter.4. Press the SET key to display its value.5. Press the UP or DOWN arrow to change its value.6. Press SET to store the new value and move to the following parameter.

To exit: Press SET + UP arrow keys or wait 15 seconds without pressing a key.NOTE 1: If no parameter is present in Pr1, after 3 seconds the noP message is displayed. Keep the keys pushed until the Pr2 message is displayed.

NOTE 2: The set value is stored even when the procedure is exited by allowing the time-out to expire.

1. Press and hold the UP and DOWN arrow keys simultaneously for more than 3 seconds.2. The POF message will be displayed and the keyboard will be locked.

At this point, it will be possible only to see the setpoint or the MAX or MIN temperature stored. If a key is pressed for more than 3 seconds the POF message will be displayed.

1. Press and hold the UP and DOWN arrow keys simultaneously for more than 3 seconds until the Pon message is displayed.

HOW TO SEE THE SETPOINT

HOW TO CHANGE THE SETPOINT

HOW TO CHANGE THE AC, Lod, ALU AND ALL PARAMETERS

HOW TO CHANGE THE DIFFERENTIAL VALUE (Hy)

HOW TO LOCK THE KEYBOARD

HOW TO UNLOCK THE KEYBOARD


Maximum and Minimum Temperature

1. Press and release the DOWN arrow key. The Lo message will be displayed followed by the minimum temperature recorded.2. By pressing the DOWN arrow key again or waiting 5 seconds, the normal display will be restored.

1. Press and release the UP arrow key. The Hi message will be displayed followed by the maximum temperature recorded.2. By pressing the UP arrow key again or waiting 5 seconds, the normal display will be restored.

1. Press and hold the SET key for more than 3 seconds, while the maximum or minimum temperature is displayed. (rSt message will be displayed)2. To confirm the operation, the rSt message will blink and the normal temperature will be displayed.

Alarm SignalsMessage Cause Outputs

P1 Enclosure probe failure Alarm relay operates; start and stop of the compressor after 15-minute intervalsP2 Condenser probe failure Alarm relay operates HA Maximum temperature alarm: P1 L 105°F for 3 minutes (after initial 30 min. delay) Alarm relay operates LA Minimum temperature alarm: P1 l 45°F for 3 minutes (after initial 30 min. delay) Alarm relay operates

HA2 Condenser high temperature: P2 L 145°F for 3 minutes Alarm relay operates, compressor offLA2 Condenser low temperature: P2 l 50°F for 3 minutes Alarm relay operatesCA Evaporator coil alarm: low pressure for 2 minutes Alarm relay operates, compressor off

noP Invalid probe selected: low evaporator coil No outputs, display only

If the compressor is turned off due to an alarm, it will be able to restart after the AC anti short-cycle time delay. (Parameter AC = 5 minutes)Probe alarm P1 is cleared with no time delay after the fault is cleared. Probe alarm P2 starts and stops with no time delay.Temperature alarm HA automatically clears as soon as the temperature returns to below 105°F (the ALU setpoint) - 2°F = 103°F.Temperature alarm LA automatically clears as soon as the temperature returns to above 45°F (the ALL setpoint) + 2°F.Temperature alarm HA2 automatically clears as soon as the condenser coil temperature returns to below 135°F.Temperature alarm LA2 automatically clears as soon as the condenser coil temperature returns to above 60°FTemperature alarm CA automatically clears as soon as the pressure returns to normal.

ALARM RECOVERY

ALARM SIGNALS

HOW TO SEE THE MINIMUM TEMPERATURE

HOW TO SEE THE MAXIMUM TEMPERATURE

HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED

Functions and Parameters


Preventative MaintenanceAir Filter Service

Before performing any maintenance, turn off power to the unit.

Note: This section applies to TA20-20-xx-xx units only. TA20-10-xx-xx models have a filterless design.

Air conditioners require regular cleaning of the condensing air inlet filter. Wash the filter often, and back-flush the dirt out; or replace, if not washable, whenever it appears physically dirty. Restriction to the flow of air over the condenser coil will degrade the performance of the equipment, cause it to overheat, reduce cooling and can damage the compressor. The compressor protection system will cycle the unit off if the condenser temperature is too high or the compressor is otherwise overloaded.

Restricted air flow due to neglecting a dirty filter will cause the unit to safety off and then turn back on after it cools off, over and over (cycling). Operation in this overheat/shut down/cool down/restart mode will damage the equipment and void the

warranty.

Remove the air conditioner filter and wash, or replace if not washable. Dry thoroughly before replacing. Order replacement filters by frame size (TA20-FILTER-1) from AutomationDirect. DO NOT operate the air conditioner without the air filter, except TA20-010-xx-xx models. Such operation will allow the condensing coil to become dirty and lose efficiency, causing overheating and diminished cooling capacity. Dirty condensing coils must be back-flush cleaned using proper commercial coil cleaning compounds and thorough back-flush rinsing. Refer to directions on the cleaning compounds selected. Acid wash is not recommended as it reduces the life

of the coil.Note: Do not use solvents to clean the programmable thermostat.

Wipe with mild soap and water.

Condenser and Evaporator Fans:STRATUS air conditioners use high efficiency, long life (high duty cycle), high tech, ball bearing fans engineered for optimum performance. The bearings are sealed and require no maintenance. Keep fan blades clean for optimal performance. Before performing any maintenance, turn off power to the unit. Fans are removable and powered through plug-in connections.

CompressorSTRATUS uses hermetically factory sealed compressors that are quiet, low vibration and are maintenance-free. Overheat sensors are installed to protect the compressor from damage due to overheating.

Note: The rotary compressor runs with compressed refrigerant gas on the outer case and therefore is hot to the touch.

STRATUS air conditioners are meticulously leak-tested and run-tested after assembly. If a leak in the system should develop due to shipping damage or mechanical vibration, the leak must be detected, repaired and the refrigerant charge restored to the system by a qualified refrigeration professional.

Moving the Enclosure and the Air ConditionerIf the enclosure the STRATUS air conditioner is mounted to must be moved, remove the air conditioner from the enclosure and move the air conditioner and enclosure separately. Moving an enclosure with the air conditioner mounted may damage the enclosure and the air conditioner and void the warranties.

Replacement filters are available (purchase separately) for each of the Stratus air conditioner frame sizes. TA20-010-xx-xx units do not require filters.


TROUBLESHOOTING GUIDECOMPLAINT SYMPTOM PROBABLE CAUSE ACTION

Unit will not run Controller not on Evaporator fan not on

No power Check circuit breaker. Check voltage at power source. Power must match unit requirements, 15 Amps min.

Unit power switch off Check rocker switch inside panel.

Compressor stalls on startup

Compressor hums for 3 -5 seconds then trips Insufficient power under load Check power source, wiring and circuit breaker capacity using power quality

meter.

CB on overload Defective or disconnected run capacitor Have qualified A/C tech test and replace.

Faulty compressor Have qualified A/C tech test winding impedance. Replace compressor if defective.

Controller on LED/Snowflake not on Check programmed setpoint and indicated temperature.

LED/Snowflake blinking Unit off on anti-short cycle time delay - clears after 5 minutes.

Evaporator fan not running Defective evaporator motor Have qualified A/C tech clean, repair or replace.

Evaporator running CA alarm displayed

Setpoint too low Adjust temperature setpoint.

Low ambient Warm unit/Install low ambient crankcase heater.

Evaporator coil frozen Thaw and clean coil. Check for clogged drain. If enclosure obstruction causing air re-circulation, remove obstruction.

Low refrigerant Have qualified A/C tech check.

Unit runs but does not cool properly

Compressor cycling Cycling on set point Reprogram setpoint or increase Hy.

HA2 alarm intermittent

Dirty condenser Clean condenser coil.

Condenser air flow blocked Installation must meet minimum clearance for condenser air flow.

Adjacent unit heating air Install baffle/deflector or move unit(s).

Perform touch test: Compressor hot (190°F) Suction accumulator cold ( 50 to 65°F)

Good condenser Have qualified A/C tech check evaporator section.

Restricted air flow Clean evaporator.

Recirculating air flow Remove restriction/Install baffle/Install fan.

Unit vibrating or noisy Noise

Possible freight damageInspect all points of mechanical contact between tubing and shroud or chassis.

Tube rattling against shroudCompressor rattling against shroud Inspect compressor mounting.

Foreign object in fan/blower Clean blowers; tie-wrap any loose wiring. Replace air filter to prevent recurrence.

Broken or bent fan blade Replace blower unit or fan blade.

High refrigerant pressure due to dirty air filter, blocked or recirculating condenser air flow or dirty condenser

Test air temperature entering and leaving condenser. Entering should equal ambient. Leaving should equal entering + 15 degrees. Clean condenser with degreaser and low pressure rinse. Clean or replace filter.

Condensate draining from overflow

Drains during normal operation Door partially open or air leaks between unit and enclosure

Check door gasket and gasket compression on closing. System must be closed loop.

Condensate draining inside unit

Water leaking out around compressor Blockage in evaporator drain lines prevents water getting to the boil-off pan.

Clean condensate drains with degreaser. Check for crushed or blocked drain lines. Clean evaporator coil and check for source of contamination.

Iced-up evaporator coilDefective evaporator blower Have qualified A/C tech clean, repair or replace.

Low refrigerant Have qualified A/C tech check level.

Troubleshooting Guide


Typical Frame Size TA20-0 1000 BTU/H Units

Dimensions

All dimensions inches [millimeters]

Wiring

1 - 8 0 0 - 6 3 3 - 0 4 0 518 STRATUS TA20 Series Industrial Air Conditioners User Manual1st Edition RevA. w w w . a u t o m a t i o n d i r e c t . c o m

Typical Frame Size TA20-1 2000 BTU/H Units

Dimensions


Wiring


1 - 8 0 0 - 6 3 3 - 0 4 0 5

Cutout for Typical Frame Size TA20-0 1000 BTU/H Units

Dimensions


Cutout for Typical Frame Size TA20-1 2000 BTU/H Units


Schematic - 1000 BTU 48VDC


Schematic - 1000 BTU 120V


Schematic - 2000 BTU 120 & 240VAC


AC Unit Serial Number

AC Unit Model Number

Refrigerant Type/ Weight

Refrigerant Pressure

Notes and Model Information

Replacement PartsWiring Terminal Blocks for Stratus Air Conditioners

Manufacturer Manufacturer Part # Description2000 BTU Models

Phoenix Contact 1718504 Plug Component

Phoenix Contact 1716522 Feedthrough Header (socket)

Wiring Terminal Blocks for Stratus Air ConditionersManufacturer Manufacturer Part # Description

1000 BTU ModelsPhoenix Contact 1718494 Plug Component

Phoenix Contact 1716519 Feedthrough Header (socket)

1718504

1716522

1718494 1716519


Documents

TA20 Series User Manual - AutomationDirect · 2019-09-06 · STRATUS TA20 Series Industrial Air Conditioners User Manual 1st Edition RevA. Unpacking STRATUS Air Conditioning Equipment